Final answer:
Historians study prehistoric sub-Saharan Africa through language, oral traditions, and artifacts, but not written records.
Step-by-step explanation:
Historians study prehistoric sub-Saharan Africa through various methods including language, oral traditions, written records, and artifacts. However, one way that historians typically do not study prehistoric sub-Saharan Africa is through written records. As the term 'prehistoric' suggests, written records were not present during this time period. Instead, historians rely on other sources such as archaeological artifacts, oral traditions passed down through generations, and linguistic analysis of languages spoken in the region.
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